diff --git a/OrmTest/ExpressionTest/Field.cs b/OrmTest/ExpressionTest/Field.cs
index f8634ba60..821f9d960 100644
--- a/OrmTest/ExpressionTest/Field.cs
+++ b/OrmTest/ExpressionTest/Field.cs
@@ -29,16 +29,16 @@ namespace OrmTest.ExpressionTest
         private void FieldSingle()
         {
             Expression<Func<Student, object>> exp = it => it.Name;
-            ExpressionContext expContext = new ExpressionContext(exp, ResolveExpressType.FieldSingle);
-            expContext.Resolve();
+            ExpressionContext expContext = new ExpressionContext();
+            expContext.Resolve(exp, ResolveExpressType.FieldSingle);
             var selectorValue = expContext.Result.GetString();
             Check(selectorValue, null, "Name", null, "FieldSingle");
         }
         private void FieldMultiple()
         {
             Expression<Func<Student, object>> exp = it => it.Name;
-            ExpressionContext expContext = new ExpressionContext(exp, ResolveExpressType.FieldMultiple);
-            expContext.Resolve();
+            ExpressionContext expContext = new ExpressionContext();
+            expContext.Resolve(exp, ResolveExpressType.FieldMultiple);
             var selectorValue = expContext.Result.GetString();
             Check(selectorValue, null, "it.Name", null, "FieldMultiple");
         }
diff --git a/OrmTest/ExpressionTest/Join.cs b/OrmTest/ExpressionTest/Join.cs
new file mode 100644
index 000000000..9f0506cc0
--- /dev/null
+++ b/OrmTest/ExpressionTest/Join.cs
@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace OrmTest.ExpressionTest
+{
+    public class Join
+    {
+    }
+}
diff --git a/OrmTest/ExpressionTest/Method.cs b/OrmTest/ExpressionTest/Method.cs
index 540fef942..943f9cf38 100644
--- a/OrmTest/ExpressionTest/Method.cs
+++ b/OrmTest/ExpressionTest/Method.cs
@@ -38,8 +38,8 @@ namespace OrmTest.ExpressionTest
         private void Contains()
         {
             Expression<Func<Student, bool>> exp = it => NBORM.Contains(it.Name,"a");
-            SqlServerExpressionContext expContext = new SqlServerExpressionContext(exp, ResolveExpressType.WhereSingle);
-            expContext.Resolve();
+            SqlServerExpressionContext expContext = new SqlServerExpressionContext();
+            expContext.Resolve(exp, ResolveExpressType.WhereSingle);
             var value = expContext.Result.GetString();
             var pars = expContext.Parameters;
             base.Check(value, pars, " (Name like '%'+@MethodConst0+'%') ", new List<SugarParameter>() {
@@ -50,8 +50,8 @@ namespace OrmTest.ExpressionTest
         private void Trim()
         {
             Expression<Func<Student, bool>> exp = it =>NBORM.Trim("  a")==it.Name;
-            SqlServerExpressionContext expContext = new SqlServerExpressionContext(exp, ResolveExpressType.WhereSingle);
-            expContext.Resolve();
+            SqlServerExpressionContext expContext = new SqlServerExpressionContext();
+            expContext.Resolve(exp, ResolveExpressType.WhereSingle);
             var value = expContext.Result.GetString();
             var pars = expContext.Parameters;
             base.Check(value, pars, "((rtrim(ltrim(@MethodConst0)))  = Name )", new List<SugarParameter>() {
@@ -62,8 +62,8 @@ namespace OrmTest.ExpressionTest
         private void ToUpper()
         {
             Expression<Func<Student, bool>> exp = it =>"a"== NBORM.ToUpper(it.Id) ;
-            SqlServerExpressionContext expContext = new SqlServerExpressionContext(exp, ResolveExpressType.WhereSingle);
-            expContext.Resolve();
+            SqlServerExpressionContext expContext = new SqlServerExpressionContext();
+            expContext.Resolve(exp, ResolveExpressType.WhereSingle);
             var value = expContext.Result.GetString();
             var pars = expContext.Parameters;
             base.Check(value, pars, "( @Const0  = (UPPER(Id)) )", new List<SugarParameter>() {
@@ -73,8 +73,8 @@ namespace OrmTest.ExpressionTest
         private void ToLower()
         {
             Expression<Func<Student, bool>> exp = it => "a" == NBORM.ToLower(it.Id);
-            SqlServerExpressionContext expContext = new SqlServerExpressionContext(exp, ResolveExpressType.WhereSingle);
-            expContext.Resolve();
+            SqlServerExpressionContext expContext = new SqlServerExpressionContext();
+            expContext.Resolve(exp, ResolveExpressType.WhereSingle);
             var value = expContext.Result.GetString();
             var pars = expContext.Parameters;
             base.Check(value, pars, "( @Const0  = (LOWER(Id)) )", new List<SugarParameter>() {
@@ -86,8 +86,8 @@ namespace OrmTest.ExpressionTest
         private void StringIsNullOrEmpty()
         {
             Expression<Func<Student, bool>> exp = it => it.Id > 2 || NBORM.IsNullOrEmpty(it.Id); ;
-            SqlServerExpressionContext expContext = new SqlServerExpressionContext(exp, ResolveExpressType.WhereSingle);
-            expContext.Resolve();
+            SqlServerExpressionContext expContext = new SqlServerExpressionContext();
+            expContext.Resolve(exp, ResolveExpressType.WhereSingle);
             var value = expContext.Result.GetString();
             var pars = expContext.Parameters;
             base.Check(value, pars, "(( Id  > @Id0 )  OR  ( Id='' OR Id IS NULL ))", new List<SugarParameter>() {
@@ -97,8 +97,8 @@ namespace OrmTest.ExpressionTest
         private void StringIsNullOrEmpty2()
         {
             Expression<Func<Student, bool>> exp = it => 2 == it.Id || NBORM.IsNullOrEmpty(true); ;
-            SqlServerExpressionContext expContext = new SqlServerExpressionContext(exp, ResolveExpressType.WhereSingle);
-            expContext.Resolve();
+            SqlServerExpressionContext expContext = new SqlServerExpressionContext();
+            expContext.Resolve(exp, ResolveExpressType.WhereSingle);
             var value = expContext.Result.GetString();
             var pars = expContext.Parameters;
             base.Check(value, pars, "(( @Id0  = Id )  OR  ( @MethodConst1='' OR @MethodConst1 IS NULL ))", new List<SugarParameter>() {
@@ -110,8 +110,8 @@ namespace OrmTest.ExpressionTest
         {
             int a = 1;
             Expression<Func<Student, bool>> exp = it => 2 == it.Id || NBORM.IsNullOrEmpty(a); ;
-            SqlServerExpressionContext expContext = new SqlServerExpressionContext(exp, ResolveExpressType.WhereSingle);
-            expContext.Resolve();
+            SqlServerExpressionContext expContext = new SqlServerExpressionContext();
+            expContext.Resolve(exp, ResolveExpressType.WhereSingle);
             var value = expContext.Result.GetString();
             var pars = expContext.Parameters;
             base.Check(value, pars, "(( @Id0  = Id )  OR  ( @MethodConst1='' OR @MethodConst1 IS NULL ))", new List<SugarParameter>() {
@@ -123,8 +123,8 @@ namespace OrmTest.ExpressionTest
         {
             WhereConst.name = "xx";
             Expression<Func<Student, bool>> exp = it => 2 == it.Id || NBORM.IsNullOrEmpty(WhereConst.name); ;
-            SqlServerExpressionContext expContext = new SqlServerExpressionContext(exp, ResolveExpressType.WhereSingle);
-            expContext.Resolve();
+            SqlServerExpressionContext expContext = new SqlServerExpressionContext();
+            expContext.Resolve(exp, ResolveExpressType.WhereSingle);
             var value = expContext.Result.GetString();
             var pars = expContext.Parameters;
             base.Check(value, pars, "(( @Id0  = Id )  OR  ( @MethodConst1='' OR @MethodConst1 IS NULL ))", new List<SugarParameter>() {
diff --git a/OrmTest/ExpressionTest/Select.cs b/OrmTest/ExpressionTest/Select.cs
index efc692fbe..964569c93 100644
--- a/OrmTest/ExpressionTest/Select.cs
+++ b/OrmTest/ExpressionTest/Select.cs
@@ -32,8 +32,8 @@ namespace OrmTest.ExpressionTest
         private void Multiple()
         {
             Expression<Func<Student, School, object>> exp = (it, school) => new Student() { Name = "a", Id = it.Id, SchoolId = school.Id, TestId = it.Id + 1 };
-            ExpressionContext expContext = new ExpressionContext(exp, ResolveExpressType.SelectMultiple);
-            expContext.Resolve();
+            ExpressionContext expContext = new ExpressionContext();
+            expContext.Resolve(exp, ResolveExpressType.SelectMultiple);
             var selectorValue = expContext.Result.GetString();
             var pars = expContext.Parameters;
             base.Check(
@@ -48,8 +48,8 @@ namespace OrmTest.ExpressionTest
         private  void MultipleDynamic()
         {
             Expression<Func<Student, School, object>> exp = (it, school) => new { Name = "a", Id = it.Id / 2, SchoolId = school.Id };
-            ExpressionContext expContext = new ExpressionContext(exp, ResolveExpressType.SelectMultiple);
-            expContext.Resolve();
+            ExpressionContext expContext = new ExpressionContext();
+            expContext.Resolve(exp, ResolveExpressType.SelectMultiple);
             var selectorValue = expContext.Result.GetString();
             var pars = expContext.Parameters;
             base.Check(
@@ -64,8 +64,8 @@ namespace OrmTest.ExpressionTest
         {
             int p = 1;
             Expression<Func<Student, object>> exp = it => new Student() { Name = "a", Id = it.Id, SchoolId = p,TestId=it.Id+1 };
-            ExpressionContext expContext = new ExpressionContext(exp, ResolveExpressType.SelectSingle);
-            expContext.Resolve();
+            ExpressionContext expContext = new ExpressionContext();
+            expContext.Resolve(exp, ResolveExpressType.SelectSingle);
             var selectorValue = expContext.Result.GetString();
             var pars = expContext.Parameters;
             base.Check(
@@ -82,8 +82,8 @@ namespace OrmTest.ExpressionTest
         {
             string a = "a";
             Expression<Func<Student, object>> exp = it => new { x = it.Id, shoolid = 1, name = a,p=it.Id*1 };
-            ExpressionContext expContext = new ExpressionContext(exp, ResolveExpressType.SelectSingle);
-            expContext.Resolve();
+            ExpressionContext expContext = new ExpressionContext();
+            expContext.Resolve(exp, ResolveExpressType.SelectSingle);
             var selectorValue = expContext.Result.GetString();
             var pars = expContext.Parameters;
             base.Check(
diff --git a/OrmTest/ExpressionTest/Where.cs b/OrmTest/ExpressionTest/Where.cs
index 128a11b88..e2e91497c 100644
--- a/OrmTest/ExpressionTest/Where.cs
+++ b/OrmTest/ExpressionTest/Where.cs
@@ -35,8 +35,8 @@ namespace OrmTest.ExpressionTest
         private void WhereMultiple1()
         {
             Expression<Func<Student, bool>> exp = it => it.Id > 1;
-            ExpressionContext expContext = new ExpressionContext(exp, ResolveExpressType.WhereMultiple);
-            expContext.Resolve();
+            ExpressionContext expContext = new ExpressionContext();
+            expContext.Resolve(exp, ResolveExpressType.WhereMultiple);
             var value = expContext.Result.GetString();
             var pars = expContext.Parameters;
             base.Check(value, pars, "( it.Id  > @Id0 )", new List<SugarParameter>() {
@@ -48,8 +48,8 @@ namespace OrmTest.ExpressionTest
             string name = "a";
             WhereConst.name = "a1";
             Expression<Func<Student, bool>> exp = it => (it.Id > 1 && it.Name != name || it.Id == 1) || it.Name == WhereConst.name;
-            ExpressionContext expContext = new ExpressionContext(exp, ResolveExpressType.WhereMultiple);
-            expContext.Resolve();
+            ExpressionContext expContext = new ExpressionContext();
+            expContext.Resolve(exp, ResolveExpressType.WhereMultiple);
             var value = expContext.Result.GetString();
             var pars = expContext.Parameters;
             base.Check(value, pars, " (((( it.Id  > @Id0 )  AND  ( it.Name <> @Name1 ))  OR  ( it.Id  = @Id2 ))  OR  ( it.Name  = @Name3 ))", new List<SugarParameter>() {
@@ -62,8 +62,8 @@ namespace OrmTest.ExpressionTest
         private void whereSingle1()
         {
             Expression<Func<Student, bool>> exp = it => it.Id > 1;
-            ExpressionContext expContext = new ExpressionContext(exp, ResolveExpressType.WhereSingle);
-            expContext.Resolve();
+            ExpressionContext expContext = new ExpressionContext();
+            expContext.Resolve(exp, ResolveExpressType.WhereSingle);
             var value = expContext.Result.GetString();
             var pars = expContext.Parameters;
             base.Check(value, pars, "( Id  > @Id0 )", new List<SugarParameter>() {
@@ -73,8 +73,8 @@ namespace OrmTest.ExpressionTest
         private void whereSingle2()
         {
             Expression<Func<Student, bool>> exp = it => 1 > it.Id;
-            ExpressionContext expContext = new ExpressionContext(exp, ResolveExpressType.WhereSingle);
-            expContext.Resolve();
+            ExpressionContext expContext = new ExpressionContext();
+            expContext.Resolve(exp, ResolveExpressType.WhereSingle);
             var value = expContext.Result.GetString();
             var pars = expContext.Parameters;
             base.Check(value, pars, "( @Id0  > Id )", new List<SugarParameter>() {
@@ -84,8 +84,8 @@ namespace OrmTest.ExpressionTest
         private void whereSingle3()
         {
             Expression<Func<Student, bool>> exp = it => it.Id > 1 || it.Name == "a";
-            ExpressionContext expContext = new ExpressionContext(exp, ResolveExpressType.WhereSingle);
-            expContext.Resolve();
+            ExpressionContext expContext = new ExpressionContext();
+            expContext.Resolve(exp, ResolveExpressType.WhereSingle);
             var value = expContext.Result.GetString();
             var pars = expContext.Parameters;
             base.Check(value, pars, " (( Id  > @Id0 )  OR  ( Name  = @Name1 ))", new List<SugarParameter>() {
@@ -96,8 +96,8 @@ namespace OrmTest.ExpressionTest
         private void whereSingle4()
         {
             Expression<Func<Student, bool>> exp = it => (it.Id > 1 && it.Name != "a") || it.Name == "a1";
-            ExpressionContext expContext = new ExpressionContext(exp, ResolveExpressType.WhereSingle);
-            expContext.Resolve();
+            ExpressionContext expContext = new ExpressionContext();
+            expContext.Resolve(exp, ResolveExpressType.WhereSingle);
             var value = expContext.Result.GetString();
             var pars = expContext.Parameters;
             base.Check(value, pars, " ((( Id  > @Id0 )  AND  ( Name <> @Name1 ))  OR  ( Name  = @Name2 ))  ", new List<SugarParameter>() {
@@ -111,8 +111,8 @@ namespace OrmTest.ExpressionTest
             string name = "a";
             WhereConst.name = "a1";
             Expression<Func<Student, bool>> exp = it => (it.Id > 1 && it.Name != name) || it.Name == WhereConst.name;
-            ExpressionContext expContext = new ExpressionContext(exp, ResolveExpressType.WhereSingle);
-            expContext.Resolve();
+            ExpressionContext expContext = new ExpressionContext();
+            expContext.Resolve(exp, ResolveExpressType.WhereSingle);
             var value = expContext.Result.GetString();
             var pars = expContext.Parameters;
             base.Check(value, pars, " ((( Id  > @Id0 )  AND  ( Name <> @Name1 ))  OR  ( Name  = @Name2 ))  ", new List<SugarParameter>() {
@@ -126,8 +126,8 @@ namespace OrmTest.ExpressionTest
             string name = "a";
             WhereConst.name = "a1";
             Expression<Func<Student, bool>> exp = it => (it.Id > 1 && it.Name != name||it.Id==1) || it.Name == WhereConst.name;
-            ExpressionContext expContext = new ExpressionContext(exp, ResolveExpressType.WhereSingle);
-            expContext.Resolve();
+            ExpressionContext expContext = new ExpressionContext();
+            expContext.Resolve(exp, ResolveExpressType.WhereSingle);
             var value = expContext.Result.GetString();
             var pars = expContext.Parameters;
             base.Check(value, pars, " (((( Id  > @Id0 )  AND  ( Name <> @Name1 ))  OR  ( Id  = @Id2 ))  OR  ( Name  = @Name3 ))", new List<SugarParameter>() {
diff --git a/OrmTest/OrmTest.csproj b/OrmTest/OrmTest.csproj
index cf7b4a415..c0cf825db 100644
--- a/OrmTest/OrmTest.csproj
+++ b/OrmTest/OrmTest.csproj
@@ -45,6 +45,7 @@
   <ItemGroup>
     <Compile Include="ExpressionTest\ExpTestBase.cs" />
     <Compile Include="ExpressionTest\Field.cs" />
+    <Compile Include="ExpressionTest\Join.cs" />
     <Compile Include="ExpressionTest\Method.cs" />
     <Compile Include="ExpressionTest\Select.cs" />
     <Compile Include="ExpressionTest\Where.cs" />
diff --git a/SqlSugar/Databases/SqlServer/Db/SqlBuilder/SqlServerExpressionContext.cs b/SqlSugar/Databases/SqlServer/Db/SqlBuilder/SqlServerExpressionContext.cs
index f3ca2b63c..9742ba82a 100644
--- a/SqlSugar/Databases/SqlServer/Db/SqlBuilder/SqlServerExpressionContext.cs
+++ b/SqlSugar/Databases/SqlServer/Db/SqlBuilder/SqlServerExpressionContext.cs
@@ -12,7 +12,7 @@ namespace SqlSugar
     public partial class SqlServerExpressionContext : ExpressionContext, ILambdaExpressions
     {
         public SqlSugarClient Context { get; set; }
-        public SqlServerExpressionContext(Expression expression, ResolveExpressType resolveType) : base(expression, resolveType)
+        public SqlServerExpressionContext()
         {
             base.DbMehtods = new SqlServerMethod();
         }