diff --git a/ICSharpCode.Decompiler.Tests/TestCases/Correctness/StringConcat.cs b/ICSharpCode.Decompiler.Tests/TestCases/Correctness/StringConcat.cs
index ebe8de7ce..01d15eccd 100644
--- a/ICSharpCode.Decompiler.Tests/TestCases/Correctness/StringConcat.cs
+++ b/ICSharpCode.Decompiler.Tests/TestCases/Correctness/StringConcat.cs
@@ -107,11 +107,19 @@ namespace ICSharpCode.Decompiler.Tests.TestCases.Correctness
 			Console.WriteLine(s);
 		}
 
+		static void TestCharPlusChar(string a)
+		{
+			Console.WriteLine("TestCharPlusChar:");
+			Console.WriteLine(a[0] + a[1]);
+			Console.WriteLine(a[0].ToString() + a[1].ToString());
+		}
+
 		static void Main()
 		{
 			TestClass();
 			TestStruct();
 			TestStructMutation();
+			TestCharPlusChar("ab");
 		}
 	}
 }
diff --git a/ICSharpCode.Decompiler/CSharp/Transforms/ReplaceMethodCallsWithOperators.cs b/ICSharpCode.Decompiler/CSharp/Transforms/ReplaceMethodCallsWithOperators.cs
index 194c4f603..f031778fd 100644
--- a/ICSharpCode.Decompiler/CSharp/Transforms/ReplaceMethodCallsWithOperators.cs
+++ b/ICSharpCode.Decompiler/CSharp/Transforms/ReplaceMethodCallsWithOperators.cs
@@ -61,11 +61,16 @@ namespace ICSharpCode.Decompiler.CSharp.Transforms
 			if (IsStringConcat(method) && CheckArgumentsForStringConcat(arguments)) {
 				bool isInExpressionTree = invocationExpression.Ancestors.OfType<LambdaExpression>().Any(
 					lambda => lambda.Annotation<IL.ILFunction>()?.Kind == IL.ILFunctionKind.ExpressionTree);
-				Expression expr = arguments[0].Detach();
+				Expression arg0 = arguments[0].Detach();
+				Expression arg1 = arguments[1].Detach();
 				if (!isInExpressionTree) {
-					expr = RemoveRedundantToStringInConcat(expr, method, isLastArgument: false).Detach();
+					arg1 = RemoveRedundantToStringInConcat(arg1, method, isLastArgument: arguments.Length == 2).Detach();
+					if (arg1.GetResolveResult().Type.IsKnownType(KnownTypeCode.String)) {
+						arg0 = RemoveRedundantToStringInConcat(arg0, method, isLastArgument: false).Detach();
+					}
 				}
-				for (int i = 1; i < arguments.Length; i++) {
+				var expr = new BinaryOperatorExpression(arg0, BinaryOperatorType.Add, arg1);
+				for (int i = 2; i < arguments.Length; i++) {
 					var arg = arguments[i].Detach();
 					if (!isInExpressionTree) {
 						arg = RemoveRedundantToStringInConcat(arg, method, isLastArgument: i == arguments.Length - 1).Detach();