Exhibit 99.1 Joint Filer Information Date of Event Requiring Statement: January 6, 2010 Issuer Name and Ticker or Trading Crosstex Energy, L.P. [XTEX] Symbol: Designated Filer: GSO Crosstex Holdings LLC Other Joint Filers: Blackstone / GSO Capital Solutions Fund LP Blackstone / GSO Capital Solutions Associates LLC GSO Holdings I LLC Blackstone Holdings I L.P. Blackstone Holdings I/II GP Inc. The Blackstone Group L.P. Blackstone Group Management L.L.C. Mr. Stephen A. Schwarzman Bennett J. Goodman, J. Albert Smith III, Douglas I. Ostrover Addresses: The address of the principal business and principal office of each of GSO Crosstex Holdings LLC, Blackstone/GSO Capital Solutions Fund LP, Blackstone/GSO Capital Solutions Associates LLC, Bennett J. Goodman, J. Albert Smith III and Douglas I. Ostrover is C/O GSO Capital Partners LP, 280 Park Avenue, New York, NY 10017. The address of the principal business and principal office of each of GSO Holdings I LLC, Blackstone Holdings I L.P., Blackstone Holdings I/II GP Inc., The Blackstone Group L.P., Blackstone Group Management L.L.C. and Mr. Stephen A. Schwarzman is c/o The Blackstone Group, 345 Park Avenue, New York, NY 10154. Signatures: Dated: January 19, 2010 GSO Crosstex Holdings LLC By: /s/ George Fan Name: George Fan Title: Authorized Person Blackstone / GSO Capital Solutions Fund LP By: /s/ George Fan Name: George Fan Title: Authorized Person Blackstone / GSO Capital Solutions Associates LLC By: /s/ George Fan Name: George Fan Title: Authorized Person GSO Holdings I LLC By: /s/ Robert L. Friedman Name: Robert L. Friedman Title: Authorized Person Blackstone Holdings I L.P. By: /s/ Robert L. Friedman Name: Robert L. Friedman Title: Authorized Person Blackstone Holdings I/II GP Inc. By: /s/ Robert L. Friedman Name: Robert L. Friedman Title: Authorized Person The Blackstone Group L.P. By: /s/ Robert L. Friedman Name: Robert L. Friedman Title: Authorized Person Blackstone Group Management L.L.C. By: /s/ Robert L. Friedman Name: Robert L. Friedman Title: Authorized Person Mr. Stephen A. Schwarzman By: /s/ Stephen A. Schwarzman Name: Stephen A. Schwarzman Bennett J. Goodman By: /s/ George Fan Name: George Fan Title: Attorney-In-Fact J. Albert Smith III By: /s/ George Fan Name: George Fan Title: Attorney-In-Fact Douglas I. Ostrover By: /s/ George Fan Name: George Fan Title: Attorney-In-Fact