Query: Update documentation for different ctors of SqlExpression

Resolves #21404

Author: smitpatel

src/EFCore.Relational/Query/SqlExpressions/CaseExpression.cs

@@ -24,7 +24,7 @@ public class CaseExpression : SqlExpression
         private readonly List<CaseWhenClause> _whenClauses = new List<CaseWhenClause>();
 
         /// <summary>
-        ///     Creates a new instance of the <see cref="CaseExpression" /> class.
+        ///     Creates a new instance of the <see cref="CaseExpression" /> class which represents a simple CASE expression.
         /// </summary>
         /// <param name="operand"> An expression to compare with <see cref="CaseWhenClause.Test"/> in <see cref="WhenClauses"/>. </param>
         /// <param name="whenClauses"> A list of <see cref="CaseWhenClause"/> to compare and get result from. </param>
@@ -43,7 +43,7 @@ public CaseExpression(
         }
 
         /// <summary>
-        ///     Creates a new instance of the <see cref="CaseExpression" /> class.
+        ///     Creates a new instance of the <see cref="CaseExpression" /> class which represents a searched CASE expression.
         /// </summary>
         /// <param name="whenClauses"> A list of <see cref="CaseWhenClause"/> to evaluate condition and get result from. </param>
         /// <param name="elseResult"> A value to return if no <see cref="WhenClauses"/> matches, if any. </param>

src/EFCore.Relational/Query/SqlExpressions/InExpression.cs

@@ -23,7 +23,7 @@ namespace Microsoft.EntityFrameworkCore.Query.SqlExpressions
     public class InExpression : SqlExpression
     {
         /// <summary>
-        ///     Creates a new instance of the <see cref="InExpression" /> class.
+        ///     Creates a new instance of the <see cref="InExpression" /> class which represents a <paramref name="item"/> IN subquery expression.
         /// </summary>
         /// <param name="item"> An item to look into values. </param>
         /// <param name="negated"> A value indicating if the item should be present in the values or absent. </param>
@@ -40,7 +40,7 @@ public InExpression(
         }
 
         /// <summary>
-        ///     Creates a new instance of the <see cref="InExpression" /> class.
+        ///     Creates a new instance of the <see cref="InExpression" /> class which represents a <paramref name="item"/> IN values expression.
         /// </summary>
         /// <param name="item"> An item to look into values. </param>
         /// <param name="negated"> A value indicating if the item should be present in the values or absent. </param>
@@ -57,7 +57,7 @@ public InExpression(
         }
 
         /// <summary>
-        ///     Creates a new instance of the <see cref="InExpression" /> class.
+        ///     Creates a new instance of the <see cref="InExpression" /> class which represents a <paramref name="item"/> IN subquery expression.
         /// </summary>
         /// <param name="item"> An item to look into values. </param>
         /// <param name="subquery"> A subquery in which item is searched. </param>
@@ -73,7 +73,7 @@ public InExpression(
         }
 
         /// <summary>
-        ///     Creates a new instance of the <see cref="InExpression" /> class.
+        ///     Creates a new instance of the <see cref="InExpression" /> class which represents a <paramref name="item"/> IN values expression.
         /// </summary>
         /// <param name="item"> An item to look into values. </param>
         /// <param name="values"> A list of values in which item is searched. </param>

src/EFCore.Relational/Query/SqlExpressions/SqlFunctionExpression.cs

@@ -24,7 +24,7 @@ namespace Microsoft.EntityFrameworkCore.Query.SqlExpressions
     public class SqlFunctionExpression : SqlExpression
     {
         /// <summary>
-        ///     Creates a new instance of the <see cref="SqlFunctionExpression" /> class.
+        ///     Creates a new instance of the <see cref="SqlFunctionExpression" /> class which represents a built-in niladic function.
         /// </summary>
         /// <param name="functionName"> The name of the function. </param>
         /// <param name="nullable"> A bool value indicating whether this function can return null. </param>
@@ -40,7 +40,7 @@ public SqlFunctionExpression(
         }
 
         /// <summary>
-        ///     Creates a new instance of the <see cref="SqlFunctionExpression" /> class.
+        ///     Creates a new instance of the <see cref="SqlFunctionExpression" /> class which represents a niladic function.
         /// </summary>
         /// <param name="schema"> The schema in which the function is defined. </param>
         /// <param name="functionName"> The name of the function. </param>
@@ -58,7 +58,7 @@ public SqlFunctionExpression(
         }
 
         /// <summary>
-        ///     Creates a new instance of the <see cref="SqlFunctionExpression" /> class.
+        ///     Creates a new instance of the <see cref="SqlFunctionExpression" /> class which represents a niladic function which is invoked on an instance.
         /// </summary>
         /// <param name="instance"> An expression on which the function is defined. </param>
         /// <param name="functionName"> The name of the function. </param>
@@ -91,7 +91,7 @@ private SqlFunctionExpression(
         }
 
         /// <summary>
-        ///     Creates a new instance of the <see cref="SqlFunctionExpression" /> class.
+        ///     Creates a new instance of the <see cref="SqlFunctionExpression" /> class which represents a built-in function.
         /// </summary>
         /// <param name="functionName"> The name of the function. </param>
         /// <param name="arguments"> The arguments of the function. </param>
@@ -111,7 +111,7 @@ public SqlFunctionExpression(
         }
 
         /// <summary>
-        ///     Creates a new instance of the <see cref="SqlFunctionExpression" /> class.
+        ///     Creates a new instance of the <see cref="SqlFunctionExpression" /> class which represents a function.
         /// </summary>
         /// <param name="schema"> The schema in which the function is defined. </param>
         /// <param name="functionName"> The name of the function. </param>
@@ -133,7 +133,7 @@ public SqlFunctionExpression(
         }
 
         /// <summary>
-        ///     Creates a new instance of the <see cref="SqlFunctionExpression" /> class.
+        ///     Creates a new instance of the <see cref="SqlFunctionExpression" /> class which represents a function which is invoked on an instance.
         /// </summary>
         /// <param name="instance"> An expression on which the function is applied. </param>
         /// <param name="functionName"> The name of the function. </param>